Aquarium heater



FIG. 1 is a perspective view;

FIG. 2 is a front view;

FIG. 3 is a side view, the opposite side being a mirror image of thatshown;

FIG. 4 is a top view;

FIG. 5 is a bottom view; and,

FIG. 6 is a back view which show the aquarium heater of the presentinvention.

The upper clamping member has been shown broken away in FIGS. 3 - 5 toindicate indeterminate length.

The ornamental design for an aquarium heater, as shown and described.